v1.0.3: Bump version to 1.0.3 and improve bs-touchspin library:

- Updated `composer.json` and `bs-touchspin.js` version to 1.0.3.
- Removed redundant `step === "any"` condition for streamlined logic.
- Added new input example in the demo for enhanced user interactions.
- Refined logic to ensure proper button state handling and input readiness.